A glass kiln flue gas desulfurization, denitrification and dust removal integrated device and process

Abstract

The invention discloses an integrated device for desulfurization, denitrification and dust removal of glass kiln flue gas, which comprises a desulfurization and denitration agent storage tank, a desulfurization and denitration reactor, an injection system, a flower plate, a catalytic ceramic membrane, a transition chamber, and an ash conveying pipe. The desulfurization and denitrification reactor includes an upper box, a middle box, and a lower box. The flower plate is located between the upper box and the middle box. The flower plate has a flower plate hole; the catalytic ceramic membrane includes an enlarged section , a catalytic body and a supporting bottom, the catalytic body includes a filter layer, a filter catalytic layer, a main catalytic layer and a main clean gas channel from the outside to the inside, the main catalytic layer is 3-10cm thick, and there are auxiliary clean gas channels distributed inside . The invention discloses a glass kiln flue gas desulfurization, denitrification and dust removal integrated device and process, which can complete dust removal, desulfurization, and denitrification in one device, and greatly reduce glass kiln flue gas treatment equipment while improving the efficiency of desulfurization, denitrification and dust removal Volume, reduce equipment investment.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and in particular relates to an integrated device and process for flue gas desulfurization, denitration and dust removal in a glass furnace. Background technique [0002] The flue gas in the glass industry has the characteristics of large amount of flue gas and low concentration of dust, sulfur oxides and nitrogen oxides. The current treatment process generally adopts the flue gas drawn from the temperature window of the first waste heat boiler around 350 °C and enters the high-temperature electrostatic precipitator. The system is dedusted, and then the flue gas enters the SCR denitration system to reduce NOx to N under the action of the reducing agent NH3 2 and H 2 O), the flue gas that meets the standard for dust removal and denitrification will then enter the second waste heat boiler to recover heat to about 120 °C, enter the dry desulfurization device, and finally discharge into t...

AI Technical Summary

Problems solved by technology

However, due to the particularity of the glass industry, that is, the dust particles are extremely small and have strong viscosity, there are some common problems in this process at present: 1) the efficiency of high-temperature electrostatic precipitator is difficult to reach the design efficiency; 2) due to the problem of high-temperature electrostatic precipitator The denitrification catalyst deactivates quickly, so that the denitrification operation cannot reach the design efficiency for several months; 3) There are two dust removal processes in this process, the bag dust removal system necessary for the electric dust removal process and dry desulfurization, so that the system is redundant and the equipment Occupies a large area, resulting in excessive investment and operating costs

At present, the integrated technology of desulfurization, denitrification and dust removal is mostly realized by catalytic ceramic membranes. In order to reduce the running resistance of catalytic ceramic membranes, the wall thickness of ceramic membranes generally does not exceed 1cm. The contact time between flue gas and catalytic ceramic membranes is too short, and nitrogen oxides cannot fully react.

The wall thickness of the catalytic ceramic membrane increases, and after the running resistance increases, the effect of reverse injection becomes worse, and the dust on the surface of the catalytic ceramic membrane cannot be effectively removed

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